Outboard-bearing for automobile-truck jack-shafts.



APPLICATION FILED FEB. 5, I918.

Patented 001;. 8, 1918.

INVEN OR BY Z M ATTORNEY neonate.

To all wiwme't may concern: 7'

Beit mom that l, Snvnmn Lnnsom'citizen of the United States, residing at Seattle,

inthe county of King 'and State'of ashington, have invented certainnew and useful Improvements in Outboard-Bearings for Automobile-Truck Jack-Shafts, of which the following is a specification;

This invention relates to improvements in out board bearings for automobile truck jack shafts and has for its principal object to provide an improved and novel design of out board bearing for use with light automo'.

bile trucks which it is necessary to pro vide an outside bearing to support the outer ends of the jack shalt.- In certain wellhnown methods of rebuilding Ford chassis into light trucks it iscoon practice to extend the. side frames of the chassis, set the rear Wheels back under the extension portion and drive the rear axle with chains from the original rear axle on 'thelchassisu lin ts construction'the orininal rear axle of thechassis is called a jaclr shaft and the sprockets replace the rear wheels as formerly employed. Considerable dculty has been experienced in this type of construction with the excessive straining and .31. outer end of the jack shaft. Applicant has therefore devised a novel construction for an out board hearing which obviates the above culty.

Uther. objects will appear as my invention is more fully explained in the following specification, illustrated in the accompanying drawings and pointed out in the appended claims. 4

in the drawings Figure l is a side elevation or applicants device shown attached to a iraent of a truck. Fig, 2 is an end elevation of same. l ig. 3 is an enlarged de-v tailed sectional elevation of applicants r= m s.

heferring more articularly to the drawings numeral 1 in icates the side frame of I the chassis to which is secur a downwardly extendin bearing 2 within which a iaclr shaft 3 is mounted. Tlhe end of the jack shaft extends out beyond the bearing 2 and upon this extended portion of the shaft is mounted a brake drum 4 upon which a brakeband 5 operates. Beyond the brake drum a chain sprocket 6 is secured to the shaft and still farther beyond the chain sprocket applicant mounts his out board bearing. Applicants out board bearing consists of a rigid s ecification of Letters Eatent.

of the Patend @ct. e, ree s.-

Application and Ecbruary 5, me. Serial no. aisles.

and horizontal member 7, a vertical and-upst'ding member 8 which is integral with the member 7 and which is providedwith an annular extension 9 at its up er end. lhe extension 9 is secured to the ottom' of the body 10 of the truck. Just forward of the upright memberB a horizontal and vertically inclined member 11 extends inwardly toward the side frame 1 and terminates at its inner end in a horizontalmember 12 which is parallel to the member 7 and which lies against the outer side of theside fra l and is so cured thereto by means of bolts 13. A stifiening rod 14: passes. through the member '3' directly beneath the member 8 and extends upwardly and inwardly until it intersects the side frame 1 to which it is secured. The stiffening rod 14: serves to stey the bearing laterally. It will thus be seen that applicant has provided an out board hearing which has three distinct points of support and whichis peculiarly well adapted to the conditions at hand as the bearing must not interfere with the f operation of a s rocket chain 15. The member 7 is provlded with a threaded transverse 'openin which is in-e with. shaft 3 and througg which the end of shaft 3' projects slightly. e hole in member is considerably larger than the shaft and is adapted to adjustably receive an externally threaded housin 16 which fits loosely over the end of the sit. and which is open at its outer end. An outer ring 17 of a ball bearing" is force-fitted into the housing 16 and the inner ring 18 of said bearing is similarly fitted to the end of shaft 3. Ball bearings 19 int/sediate the ringsl? and 18 thus providing an antifriction bearing for the extended and of the shaft 3., The outer end of housing it is threaded externally and is provided with a hub cap 20 which screws on to the threaded portion of the housing. The cap QO-serves two purposes, namely, that or preventin till lllld the dust anddirt from getting into the b l bearing and that of forcing ase into the with ease and the settingup of the cap will force this into the ball beag 'ss. 1 r a While I have shown a particular to cl emboent of my invention, 1 aware that many minor changes therein will readily suggest themselves to others sedin the art without departing from the spirit and scope of the invention, and I therefore jack shaft positioned transversely the said sideframes, an out board bearing means for supporting the free end of the said shaft at a point beyond the said side frames; said out board caring means including a horizontal member which is provided with a threaded opening through which the said shaft projects, a vertical extension member integral with the said horizontal member, a vertically inclined member integral with the said horizontal member and secured at its inner end to the said side frame, a threaded housing positioned within the opening in the said horizontal member and inclosing the end of the said shaft, and a ball bearing within the said housing and cooperating with the said shaft, whereby the outer end of the shaft is revolubly and rigidly supported.

' 2. In a device of the class described the combination of a truck side frame, a jack shaft arranged at right angles to and positioned beneath the said side frame, a truck body resting upon the said frame member and extending horizontally beyond the said frame member, an out board bearin adapted to support the outer end of the said shaft; said out board bearing including a horizontal member parallel with the said side frame and having an internally threaded opening positioned concentrically with the end of the said shaft, an upwardly extending member integral with the said horizontal member and secured at its upper end to the said truck body, an upwardlyand inwardly inclined member integral with the said horizontal member, another horizontal member parallel with the first mentioned horizontal,

member and integral with the free end of the said inclined member and secured to the outer side of side frame, a stiffening rod secured at its outer end to the first mentioned horizontal member and at its inner end to the side frame, whereby the bearing is stifl'- ened laterally, an externally threaded housing screwed within the opening in the first mentioned horizontal member and inclosing the end of the said shaft, a ball bearing intermediate the shaft and-the inside of the housing, whereby the outer end of the shaft is provided with a rigid and anti-friction bearing, a hub cap on the openend of the said housing, whereby the housing may be closed.

In testimony whereof I affix my signature.

SEVERIN LARSON. 

